We have a John Deere 2 cycle pole saw/hedge trimmer (Model PS2683) that's been a very handy tool for us. Not a high end pro-line machine, but since it only gets 20-30 hrs a year it's worked out well. Careless teen worker (you probably know where this is going) filled it with straight gas and overheated (probably ruined) engine. Since this is a JD brand repair parts are outrageous, $250 for a cyl, and piston kits! The machine isn't worth that much, but there are some jobs that it's really worth having. I pulled the manual, and the engine was warranteed by Mitsubishi, so I'm pretty sure it's a Mitsubishi TU26 engine. I've never had to work on my own machines beyond regular service and maintenance, but I restore cars too, so I know how to wrench. In shopping for a replacement engine, I've found: 1. It doesn't look like there's anyone in the US selling this kind of engine 2. There's a chinese knock off of the TU26, but there are a couple 43cc Mitsu engines that are available (out of US sellers), 3. Even after paying freight from China, a whole new (questionable brand) engine is still way less than trying to get replacement parts. Can anyone tell me what kind of interchangeability is there with these engines? Thanks in advance!